Keio Confirms Ransomware Hit Business Systems

Keio Corporation, a major Japanese private railway operator, confirmed a ransomware attack on September 26, 2026, that disrupted business systems. The company shut down its network and reported the incident to police. The attack appears to have affected only its hospitality business, not train operations. Local media report payment systems were disrupted. Tokyo Metro separately disclosed unauthorized access exposing 59,000 member email addresses.